body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  margin: 10px, 0;
  padding: 0;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.container {
  text-align: center;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.keys {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 400px;
  height: 120px;
}

.advanced {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 390px;
  height: 120px;
}

h1 {
  color: #333;
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  font-size: 24px;
  background-color: #850000;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #85554D;
}

#error {
  margin-top: 20px;
  font-size: 18px;
  color: red;
}

#media {
  max-width: 1280px;
}

audio {
  margin-top: 20px;
  width: 100%;
}
